The definition of insanity is having a serious mental illness or being extremely foolish.
Great or wild foolishness:
Mental derangement; insanity
Extravagant foolishness or frivolity:
Loss of cognitive abilities, including memory, concentration, communication, planning, and abstract thinking, resulting from brain injury or from a disease such as Alzheimer's disease or Parkinson's disease. It is sometimes accompanied by emotional disturbance and personality changes.
The definition of a disturbance is an interruption of what should be going on, or a bothersome intrusion.
Part or all of this entry has been imported from the 1913 edition of Webster's Dictionary, which is now free of copyright and hence in the public domain. The imported definitions may be significantly out of date, and any more recent senses may be completely missing.
Mental illness. No longer in clinical use.
The condition of being unbalanced; imbalance
An excessive, persistent enthusiasm, liking, craving, or interest; obsession; craze
A costly undertaking having an absurd or ruinous outcome.
Foolish behavior or a foolish action
Something, such as an act or suggestion, that is considered stupid or foolish.
The condition of having a sound and rational mind; being mentally healthy and having the ability to distinguish right from wrong. In all jurisdictions, being sane is presumed, and it is up to the defense to prove the contrary to be true. Synonymous with sanity. See also insanity and insanity defense.
(Countable) A mental disorder.
Find another word for craziness. In this page you can discover 37 synonyms, antonyms, idiomatic expressions, and related words for craziness, like: insanity, lunacy, alienation, nonsense, dementia, derangement, disturbance, insaneness, madness, psychopathy and unbalance.